Blast gate



FIG. 1 is a top, right side, isometric perspective view of a blast gate in accordance with my design, with the blast gate shown in an open position;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top, right side, isometric perspective view of the blast gate in accordance with my design shown in a closed position.

The broken lines illustrate portions of the blast gate which form no part of the claimed design. 

CLAIM The ornamental design for a blast gate, as shown and described. 